Improvement in smoke-consuming apparatus



W. R. W. SMITH..

, Smoke-Consuming Apparatus.

N0. l45,022. Pa tented Nov. 25,1873.

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DEUllIIIIIHIIHHHIIIIMHIHIIFH UNITED STATES PATENT QFFICE.

WILLIAM RAE IVILSON SMITH, OF GLASGOWV, NORTH BRITAIN.

' 'lMPRO-VEMENT IN SMOKE-CONSUMING APPARATUS.

Specification forming part of Letters Patent No- 145,022, dated November25, 1873; application filed November 7, 1873.

To all whom it may concern:

Be it known that I, WILLIAM RAE WILsoN SMITH, of Glasgow, in the countyof Lanark, North Britain, have invented an Improved Smoke-ConsumingApparatus, of which the following is a specification:

The object of my invention is to consume the smoke in locomotives, andother fire-boxes or furnaces, by mixing it with air or steam, or both,superheatedby being passed through hollow grate-bars A, tubes B, and ahollow bridge, D, which are arranged within the firebox or furnace, asfully described hereafter, and as illustrated in the sectionalelevation, Figure 1, of the accompanying drawing.

- Each of the grate-bars A is cast with longitudinal grooves in itsopposite edges, so that when the said bars are grouped together therewill be a series of channels or passage, a, between them, as bestobserved in the sectional perspective view, Fig. 2, and transversesection, Fig. 3, on the line 1 2, Fig. 1. These passages a are open tothe external air at their rear ends, but communicate at their front endswith a chamber, E, which extends transversely across the fire-box F, asshown in Fig. 3, and in the sectional plan, Fig. 4, on the line 3 4,Fig. 1. Each of the tubes B, of which there are three in the presentinstance, communicates at its front end with the chamber E, and at itsrear end with the hollow bridge H, which has outlet-openings b at thetop. I prefer to construct this bridge of fire-brick, although metal maybe used.

The tubes B may be either above the gratebars, as shown, or in line withthe same, and arranged in any suitable manner, either horizontally orinclined.

The air enters the rear open ends of th hollow grate-bars A, and passesthrough them, as indicated by the arrows, into the chamber E, whence itpasses through the tubes B into the hollow bridge D, and, aftercirculating within the latter, emerges from the openings bj in ahighly-heated state, and by mingling with the smoke and other productsof combustion efi'ectually consumes the same.

The hollow grate-bars may have air forced into and through them by afan, or otherwise; or steam, to be superheated in its passage, or mixedair and steam, may be forced through the said hollow bars and tubes B.

In the present instance the grate-bars are supported at their rear endsby a transverse rod, cl, secured at its opposite extremities to twolevers, a, one of which is connected by a link, f, to a lever, 9, havingits fulcrum on the foot-plate of the engine, the object of whicharrangement is to permit the hollow gratebars to be easily and quickly.dropped as imder existing systems of carrying grate-bars.

My invention is not only applicable to 1000- motive fire-boxes, but maybe used with advantage in fire-boxes and furnaces generally, foreffecting a thorough consumption of the smoke and other products ofcombustion. In Fig. 5, for instance, my invention is illustrated asapplied to an ordinary horizontal boiler, and the arrangement of theparts is somewhat modified, the hollow grate-bars, instead of the tubesB, forming the mediums of communication between the chamber E and hollowbridge D, while the said tubes B have a return bend within the furnaceabove the bars. The direction of the currents is also reversed, the airor steam, in this instance, first passing through the tubes B, into allof which it is forced by a connecting tube, H, communicatin g with afan, I.

I claim as my invention- 1. A smoke-consuming apparatus in which hollowgrate-bars A, air or steam tubes B, and a hollow bridge, D, havingoutlet-openings b, are combined and applied to a fire-box or furnace,substantially as herein described.

2. The air or steam passages a, formed be; tween adjoining grate-bars bylongitudinal grooves in the edges of the same, as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM RAE WILSON SMITH. [1,. s 1.

\Vitnesses EDW'ARD FISHER BAMBER,

JoI-IN CAMPBELL MAoANmn.

